Hello Pottyponder,
Welcome to the Community page,
The external software will have created a journal which you would be able to copy into your Quickbooks account, We are not trained accountants, therefore, can not advise how to do this, you would need to speak to an accountant about how to record this in a journal in Quickbooks.
If there is any accountant that knows how to do this, please feel free to comment on this post.
